Love is always unbalanced. There will always be someone who loves more, but there is no need to care who gives more love. This is beyond description. However, if only one person is blindly paying for a long time, you will feel tired and love will become dull with time.
So people in love are more likely to be swayed by considerations of gain and loss. In fact, this is a very normal situation. It is necessary to face up to this problem and then solve it.